Multicompartment receptacle for the ingredients of a concrete mix



M y 1964 J. P. DARLING ETAL 3,131,741

MULTICOMPARTMENT RECEPTACLE FOR THE INGREDIENTS OF A CONCRETE MIX FiledNov. 17, 1961 4 Sheets-Sheet 1 :p Al

INVENTOR James R Darli Charles 0. Sle mm'ons ,LM *JMWM ATTORNEYS J. P.DARLING ETAL MULTICOMPARTMENT RECEPTACLE FOR THE May 5, 1964 INGREDIENTSOF A CONCRETE MIX 4 Sheets-Sheet 2 Filed NOV. 1'7, 1961 flllll-l'IIllallCharles 0. slemmons ATTORNEYS May 5, 1964 J. P. DARLING ETAL 3,131,741

MULTICOMPARTMENT RECEPTACLE FOR THE INGREDIENTS OF A CONCRETE MIX 4Sheets-Sheet 5 Filed Nov. 17, 1961 w NW5.

INVENTOR James RDow-Zing Charles 0. Slemmons Wle$; ,uea

ATTORNEYS Fiy.

May 5, 1964 J. P. DARLING ETAL MULTICOMPARTMENT RECEPTACLE FOR THEINGREDIENTS OF A CONCRETE MIX Filed Nov. 17, 1961 4 Sheets-Sheet 4 3/INVENTOR James P.Darling Charles 0. slemmans ATTORNEYS United StatesPatent 3,131,741 MULTICOMPARTMENT RECEPTACLE FOR THE INGREDIENTS OF ACONCRETE MIX James P. Darling, Mogadore, and Charles 0. Slemmons, Akron,Ohio, assignors to The General Tire & Rubber Company, Akron, Ghio, acorporation of Ohio Filed Nov. 17, 1961, Ser. No. 153,024 15 Claims.(Cl. 150-1) This invention relates to multicompartment receptacles andmore particularly to a multicompartment receptacle for transporting theingredients of a concrete mix to the place where the concrete is to bemixed and placed.

It is desirable that exact portions of aggregate water and cement beused in a concrete mix and that the cement be stored and handled beforethe mixing operation in such manner that it is not deteriorated prior tomixture with the other ingredients.

In order to insure the quality of concrete being laid, mixers mounted ontrucks are commonly employed to transfer properly proportioned concretemixes and to either deliver the concrete directly to the forms or tomixers at the place of use. It has also been found to be advantageous totransport measured ingredients of a concrete mix in a multicompartmentreceptacle in which the cement is in a moisture proof compartmentseparate from the other ingredients and to discharge the ingredientsfrom the receptacle into a mixer when it is desired to place theconcrete.

The present invention provides a receptacle which is of ruggedconstruction, which has a waterproof cement compartment and acompartment for water and aggregate and from which the cement, water andaggregate can be simultaneously delivered into a concrete mixer. Thereceptacle of the present invention is provided with a strong flexibleshock resisting body which will withstand rough usage such as droppingfrom a truck or railway car and which can be conveniently piled wheneither filled or empty with other of the containers for transportationor storage. 7

The receptacle of the present invention has an outer tubular wall whichis composed of rubber reinforced with a plurality of plies of tirefabric and which has inwardly extending ends terminating in inextensiblebeads to which end closures may be connected. The receptacle is dividedinto inner and outer compartments by an inner tubular wall of rubberwhich is sealed from the outer wall by connection at its opposite endsto said closures. One of the closures is provided with means such as anintegral eye for engagement with a hoist and the other of the closuresincludes a spider that is provided with separate access passages throughwhich material may be supplied to or discharged from the compartments.

Releasable means is provided for closing the access passages to retainthe material in the compartments until it is desired to discharge thematerial from the receptacle. When the receptacle is suspended from ahoist engaging the eye of the said closure member, the material may bedumped from the receptacle by releasing the passage closing means.

The inner tubular wall has an end of reduced diameter attached centrallyto the spider so as to open to a central passage and the outer wall ofthe receptacle is attached to the periphery of the spider so as toconnect the outer compartment to a passage surrounding the central3,131,741 Patented May 5, 1964 passage to which the inner compartment isconnected. Flexible elongated sleeves arranged one within the other areattached to the spider and form continuations of the spider passagesthrough which material may be discharged from the receptacle orintroduced into the receptacle. The sleeves are flexible and may becollapsed, folded and positioned between a pair of clamping bars whichserve to seal the passages during transportation of the concreteingredients. The end portion of the outer wall of the receptacle that isattached to the spider and that forms the dicharge end of the outercompartment when the receptacle is in dumping position is tapered tofacilitate discharge of the wet aggregate from the outer compartment andthe inner wall is also tapered near the end attached to the spider tofacilitate the discharge of cement from the inner compartment.

Reference should be had to the accompanying drawings forming part ofthis specification, in which:

FIGURE 1 is a longitudinal central section through a receptacleembodying the invention;

FIG. 2 is a fragmentary section on an enlarged scale showing the meansof attaching adjacent ends of the inner and outer tubular walls to aclosure member;

FIG. 3 is a plan view of the closure at the opposite end of thereceptacle;

FIG. 4 is a transverse section taken on the line indicated at 4-4 ofFIG. 3;

FIG. 5 is a fragmentary section taken on the line indicated at 5-5 inFIG. 3 and showing the clamp actuating cam in elevation;

FIG. 6 is a fragmentary section on an enlarged scale showing theflexible sleeves through which material may be discharged from ordelivered to the compartments of the receptacle;

FIG. 7 is a fragmentary longitudinal section on an enlarged scalethrough the free end portion of the outer sleeve;

FIG. 8 shows a fragment of the outer wall of the receptacle viewed asindicated at 3-8 in FIG. 7 with parts broken away to show the superposedplies of tire cord fabric;

FIG. 9 is a section taken on the line indicated at 99 in FIG. 8;

FIG. 10 is a side elevation showing the receptacle sus pended in itsdumping position;

FIG. 11 is a perspective view showing the flexible concentric sleeves inextended position;

FIGS. 12, 13, 14 and 15 show successive steps in the folding of thesleeves into position for clamping; and

FIG. 16 is a schematic view showing the sleeves after they have beencollapsed and folded to position a portion thereof between the clampingbars.

Referring to the accompanying drawings, the receptacle of the presentinvention has an outer flexible tubular wall 1 formed of fabricreinforced rubber, the wall 1 having an elongated body portion 2 ofsubstantially cylindrical form and end portions 3 and 4 extendingradially inwardly from the body portion. The end portion 3 is bowedaxially outwardly and the end portion 4 is of tapering, substantiallyconical form. The end portions 3 and 4 terminate in heads 5 and 6 whichdefine central openings at the ends of the receptacle and these beadsare reinforced with inextensible bead rings 7 such as used in the beadsof pneumatic tires. A closure plate 8, which may be a metal casting isattached to the head 5 at the axially "bulged end of the outer wall andthis plate is of circularform having a peripheral seat 9 to receive thebead of the outer wall. The plate 8 is in the form of an inwardly disheddisk and is stiffened by means of integral radical ribs 10 projectingfrom its inner face. The plate 8 is provided centrally thereof withsuitable hoist engaging means such as an eye 11 to receive the hook of ahoist cable.

The receptacle has an inner flexible tubular wall 12 preferably ofelastic rubber that extends axially of the receptacle to divide the sameinto an inner compartment 13 and an outer compartment 14 that surroundsthe compartrnent 13. The inner wall l2 has a cylindrical body portionwith an inturned end portion 16 which overlies the bead seat 9throughout its circumference. The bead 5 engages the portion 16 of theinner wall that overlies the seat 9 and the bead 5 and the end portion16 of the inner wall engaged by the bead 5 are clamped against the seat9 by means of a flat ring 17 that is attached to the peripheral portionof the plate 8 by means of bolts 18. The end of the inner wall 12opposite that attached to the plate 8 is cylindrical and of smallerdiameter than the body portion of the wall being connected to the bodyportion 15 by a tapering portion 20 of substantially conical form.

The opening at the end of the receptacle opposite that to which theclosure plate 8 is attached is provided with a closure in the form of aspider '21 that has an outer ring 22 provided with a peripheral seat 23to receive the bead 6 and within the ring 22 the spider is provided witha central tubular axially extending hub 24 that is spacedradially'inwardly from the ring 22 and supported by circumferentiallyspaced rigid members 25 connecting it to the outer ring 22. Access tothe interior of the receptacle for delivery of material thereto anddischarge of material therefrom are provided by the spider 21 a centralpassage being provided through the hub 24- and an outer passage throughthe space between the hub 24 and ring 22. At its innerend the tubularhub. 24 is provided on its external face with circumferential grooves 26and the small cylindrical end 1? of the inner wall 12 fits over theinner end of the hub 24 and is secured thereto by clamping rings 27which press the elastic rubber of the end 19 into the grooves 26. Thebead 6 is clamped to the bead seating ring 22 by means of a ring 28which is attached to the outer face of the'ring 22 by means of bolts 29.The ring 28 is provided with a cylindrical axially projecting flange 3%which provides means by which the receptable may be supported in fillingposition and which also provides supports for devices employed to closethe passages through which material is delivered to or dissages throughthe spider and serve to guide material to or fromthe passages of thespider. The sleeves 31 and 32 aresubstantiallyconcentric and the innersleeve 31 is secured by means of a clamping ring 33 to the outer end ofthe tubular hub 24, the sleeve 31 being formed of elastic rubber andbeing of a size to fit over the end of the hub andsecured to the hub bymeans of a clamping ring 33 which presses the rubber of the sleeve intoan external groove 34 formed inthe outer end portion of the hub 24. Theouter sleeve 32 has outturned end portions 35 that are clamped betweenthe rings 28 and 22, the outer sleeve 32 being of a diameter tosubstantially fit within the ring 28. The sleeve 32 is reinforced by alayer of fabric 36 vulcanized to its exterior face and covering thesleeve from its attached end 35 to adjacent its free end, the fabriccovering 36 terminating short of the free end of the sleeve to providean end'portion 37 that is composed entirely of elastic rubber.

Diametrically opposite openings 38 may be provided in the flange toreceive suspension members 39 by which the receptacle may be supportedin filling position. The receptacle may be filled bysuspending it froman overhead support provided with downwardly directed spouts or the likethrough which cement may be fed into the sleeve 31 and water andaggregate may be fed into the annular space between the sleeve 31 andthe outer sleeve 32. The aggregate and water is preferably fed into theouter compartment in successive relatively small increments, atpredetermined amount of coarse aggregate being first delivered, their apredetermined amount of fine aggregate such as sand and lastly apredetermined amount of water to distribute the fine aggregate throughthe coarse aggregate. By so introducing the aggregate and water into theouter compartment, the fine and coarse aggregates are thoroughly wettedand a fairly uniform dispersal of the fine aggegate through the coarseaggregate is obtained, thus reducing the power required for the mixingoperation.

The sleeves 31 and 32 are of substantial length and are so formed thatthey may be readily collapsed and folded flat. A pair of clamping bars46 and 41 are pro vided for compressing the flattened tubes to close thepassages during transportation of the receptacle. The clamping bars 40and 41 have core portions in the form of steel'rods 42 and'43 and eachof the rods has an elastic rubber covering 44 that terminates short ofits ends. The bars 40 and 41 are supported by fabric aprons 4-5 and 4-6connected tothe bars and attached to diametrically opposite portions ofthe ring 28. The aprons '45 and 46 are substantially identical and eachhas a doubled back endportion 47 clamped to the ring 28 by one or moreof the 'bolts 29. Each of the aprons also has an end portion 48 doubledback and wound aroun'd'one of the steel rods of the clamping bars. Toposition the sleeves for clamping between the bars 40 and 41, thesleeves may be flattened as shown in FIG. 12 and the flattened sleevesbent over at right angles to the axis of the receptacle as shown in FIG.'13, after which the edges of the larger outer sleeve may be folded backover the fiat inner sleeve as shown in FIG. 14 and the doubled laterallyprojecting flattened body may be bent back upon itself as shown in FIG.15 to position the outer end portions of the two sleeves between thebars 40 and 41. To facilitate the folding, the inner elastic rubbersleeve 31 may be vulcanized to substantially fiat shape and the outerfabric reinforced sleeve may have crease lines molded therein tofacilitate the. folding.

After the tubes have been folded to the position shown in FIG. 15, withthe rubber end portion 37 of the outer tube resting on the inner bar 40as shown in FIG. 15,"the

outer bar 41 may be swung to a position parallelto'the inner bar 40 andengaging the outer face of the all rubber end portion 37 of the outersleeve. 7

The opposite ends of the core rod 42 of the inner bar 40 are seated inopen sockets 49 formed in diametrically opposite portions of the outerface of the ring 28 radially inwardly of the flange 30. The core rod 43of'the outer bar 41 is longer than the inner rod 42 and has a reducedend 5t that fits in an opening 51 of the flange 30. The opposite end ofthe rod 43 is held in place and pressed toward the inner clamping bar 40by means of a cam 52 provided with an inwardly projecting curved rodengaging flange 53 that is movable into and out of engagement withtheend'of the rod 43 and which serves to hold the bar 41 in place and topress the bar 41 toward the inner bar 49 to claimp the flattenedportions of the sleeves 31 and 32 between the bars. The cam 52 iscarried by a stub shaft 54 mounted in the flange 30. -By means of ahandle 55 attached to the shaft 54 outside the flange 30, the cam 52 canbe'turne'd from its clamping position to a releasing position which willallow the clamping bar 41 to fall by gravity to the position shown inFIG. 10 when the receptacle is suspended in dumping position, afterwhich the weight of the material will force the sleeves 31 and 32 toswing downwardly and open for discharge of the material, at whichtimethe inner clamping bar it) will swing downwardly to the position shownin FIG. 10, the bars 40 and 41 being suspended in a position exteriorlyof the outer sleeve while the material is being dumped.

The rubber covering of the clamping bars 40 and 41 is preferablythickened adjacent the ends as shown at 56, to assist in holding theclamped sleeves against lateral movements between the bars.

The inner and outer sleeves 31 and 32 can be conveniently positioned forreceiving material from concentric funnels and they also serve torestrict flow during discharge into the receiving hopper of a mixer ifthe material being discharged piles up at the sleeve outlet or due tothe failure of the mixer to take the material away as fast as it isdelivered.

It should be noted that the inner sleeve 31 is longer than the outersleeve 32 as shown in FIGS. 4, 6 and 16. The sleeve 31 is made longerthan the sleeve 32 for two reasons. First, it is desirable to preventdelivery of water or aggregate into the inner compartment while thecontainer is being filled and second to prevent leakage of water intothe inner compartment during shipment or storage of the container. Whenthe sleeves 31 and 32 are supported in their receiving positions asshown in FIG. 6, the cement and water or aggregate may be delivered intothe sleeves through concentric funnels and the water and aggregate willbe delivered into the annular passage between the sleeves below the openend of the sleeves 31. *When the outlet is sealed by means ofthe-clamping bars 40 and 41 as shown in FIG. 4 the end of the sleeve 31is'positioned a substantial distance beyond the end of the sleeve 32sothat if there should be any leakage of water from the outercompartment 14 it will notbe possible for it to seep back through thesleeve 31 into the Cement in the inner compartment 13. When the sleevesare clamped to form the closure the projecting end of the sleeve 31provides a convenient indication that the sleeves are properly folded.

The foldable sleeves 31 and 32 together with the clamping rods 40 and41, their supports in the ring 30 and the actuating cam 52 and operatinglever 55 provide a convenient means for sealing the closure at theloading point and for quickly releasing the sleeves to discharge thematerial from the compartment. The lever operated cam 52 applies a highsqueeze pressure to effectively seal the outlet and it also providesconvenient quick release which can be safely operated by a man standingon a platform alongside the receiving hopper of the mixer.

The clamp bar supporting aprons 45 and 46 not only 1 serve to supportthe clamping bars on the container but also provide support for thesleeves 31 and 32 to protect them against damage by the weight ofmaterial imposed on them and serve as a shield to protect the sleevesfrom damage due to contact with rough surfaces or sharp objects.

While the size of the receptacle of the present invention can be varied,it has been found convenient to provide a receptacle having a capacitycorresponding to that of concrete mixers most commonly used. Mixershaving one and one-half cubic yards capacity are quite common and areceptacle for charging such a mixer would be substantially 48" indiameter and substantially 76" in length. In order to enable thereceptacle to carry the heavy weight and to withstand rough usage, theouter wall 1 is reinforced with several superposed plies of tire fabric.In order to provide maximum strength with high flexibility, the fabricreinforcement is in the form of tire cord fabric, each ply having itsopposite side edges wrapped around the bead rings 7 as in a tire casingand each ply being formed, of bias out fabric with parallel cordsextending diagonally from the head at one end of the receptable to thebead at the other end and the cords of successive plies of fabric havingopposite angularity, as in a conventional tire casing. By employing cordfabric reinforcement, the outer wall 1 may be manufactured on acylindrical drum, differing from the drum of a tire building machineonly in length. As in the building of tire casings the bias angle of thecords is such that the wall 1 may be expanded from the cylindrical formto which it is built on the drum into engagement with the interior of avulcanizing mold which conforms to the exterior contour of the wall 1without subjecting the cords to excessive tension.

The wall 1 is provided with an exterior covering 58 of abrasionresistant rubber which is preferably slightly softer than the rubbercommonly used in tire treads and of a hardness substantiallycorresponding to tire side Wall stock. To protect the fabric frommoisture the wall 1 is provided with an interior covering 59 of elasticrubber which may be considerably thinner than the exterior covering 58.

The inner wall 12 is preferably formed from an extruded tube having adiameter substantially that of the small end 19 of the wall. Theextruded relatively thick walled tube is placed within a sheet metalmold having an internal contour corresponding to the exterior contour ofthe wall 12 and this uncured rubber tube is then expanded by fluidpressure applied by suitable means such as an expansible air bag intoengagement with the wall of the mold and vulcanized while expandedagainst the interior of the mold. The stretching of the body portion 15of the wall 12 reduces the thickness of this portion of the tube toabout one-half the thickness of the unexpanded portion and the taperingportion 20 gradually increases in thickness from the end of thecylindrical portion 15 to the smaller cylindrical portion 19. The smallend 19 of the inner wall so constructed is relatively thick and rigidand the rigidity extends into the tapered portion 20 adjacent said smallend 19 so that the weight of the material in the end of the receptaclewhen the receptacle is suspended for dumping will not collapse the innerWall and prevent free egress of the cement from the inner compartment.

In order to prevent the creation of a subatmospheric pressure in theinner compartment 13 which might interfere with free flow of the cementfrom said compartment, the closure plate 8 is provided with a ventopening 60 in which is mounted an elastic rubber plug valve 61 which maybe moved from a position sealing the opening 60 to a position permittingflow of air through said opening. The plug 61 has a tapered inner endportion 62 which facilitates the entry of the elastic rubber plug intothe opening 60 from the outer side of the cover. The plug 61 has asealing portion 63 that fits tightly within the opening 60 and which isof an axial width corresponding to the thickness of the closure wallwhere the opening 60 is located. The plug 61 has a circumferentialretaining flange 64 that projects radially a short distance from thesealing portion 63 at its inner end for engagement with the interior ofthe cover 8 to retain the plug 61 in the opening 60. A second flexiblecircumferential retaining flange 65 is provided at the outer edge of thesealing portion 62 to retain the plug 61 against inward movement fromits sealing position. Outwardly of the retaining flange 65 the plug hasa stem portion 66 that is of less diameter than the opening 60 and thatis of an axial length greater than the thickness of the cover 8 at theopening 60. A head 67 integral with the outer end of the stem 66 is of adiameter greater than that of the opening 60 and is engageable with theexterior of the cover 8 around the opening 60 to limit the inwardmovement of the plug.

The plug 61 may be inserted into the vent opening 60 by inserting thetapered inner end 62 into the opening 60 and pressing the plug axiallyinto the opening. The axial pressure exerted on the retaining flange 63will collapse the flange against the sealing portion 64 and compress therubber sufliciently to permit passage of the flange through the openingto the interior of the cover 8 where it will expand to its normaldiameter and the plug will be held in sealing position as shown in fulllines in FIG. 2.

Before release of the clamping bars 40'and 41 'to discharge the materialfrom the container the plug 61 can be moved'inwardly to its ventingposition by pressure applied manually to the head 67. After thecontainer has been emptied the plug 61 can be pulled outwardly to itssealing position, the stem 66 having a tapered portion 68 which servesto guide the plug into axial alinement with the opening 60 as it ispulled outwardly, a circumferential groove 69 being provided alongsidethe inner face of the flange 65 to facilitate flexing of the flange 65when the plug is returned to sealing position.

The closure plate 8 is detachably secured to the container to facilitateaccess to the interior of the receptacle for repair of the outer wall orreplacement of the inner Wall. Injuries to the receptacle walls may berepaired by the techniques employed in the repair of pneumatic tires.

It is to be understood that in accordance with the provisions of thepatent statutes, variations and modifications of the specific devices'herein'shown and described may be made without departing from thespirit of the invention.

What we claim is:

1. A receptacle comprising an outer flexible tubular wall having endportions that extend radially inwardly and that terminate in annularbeads that define central end openings, said wall comprising superposedplies of tire fabric extending from bead to bead and covered eX-teriorly and interiorly with rubber, one of said end portions taperingtoward its bead, a plate closing the opening at the other end of saidwall, said plate being provided with a peripheral bead seat, an innerflexible and elastic tubular rubber Wall extending axially of thereceptacle and dividing the same into an inner compartment and an outercompartment surrounding the inner compartment, said inner tubular wallhaving one end overlying said bead seat and a smaller end adjacent theopposite end of the receptacle, means for clamping the larger end ofsaid inner wall to said plate and the adjacent bead to said bead seat, aspider attached to the tapered end of said outer wall, said spiderhaving an outer bead seating ring, a central hub supported within saidring and providing a central passage through 'said hub to or from theinner compartment and an outer passage between said hub and said ring toor from the outer compartment, means for clamping the small end of saidinner tubular wall 'to said hub, means for clamping the head at thetapered end of said outer wall to said bead seating ring, and means foropening and closing said passages.

2.-A receptacle such-as defined in claim 1 in which the beads of theouter wall are reinforced by inextensible bead rings. V

3. A receptacle such as defined in claim 1 in which the outer wall isreinforced by superposed plies of bias cut cord fabric, the cords ofeach ply extending diagonally from bead to bead and the cords 'ofsuperposed plies in crossing relation.

4. A receptacle such as defined in claim 1 in which the inwardlyextending end portion of the outer 'wall to which the closure plate isattached bulges axially outwardly.

5. Arecep'tacle such as defined in claim 1 in which the outer Wall isnormally cylindrical throughout the major portion-of its length and inwhich the large and small end portions of the inner tubular wall arenormally of cylindrical form and are connected byan intermediate taperedportion.

6. A receptacle such as defined in claim in which the inner'tubular wallincreases in thickness and rigidity toward its small end.

'7. A receptacle comprising elongated outer and inner tubular wallswhich divide the receptacle into an inner compartment and an outercompartment, said inner and outer walls being tapered'adjacent one endof 'said receptacle to facilitate discharge of material through saidend, a closure plate at the other end of the receptacle having hoistengaging means thereon, means for clamping the adjacent ends of saidtubular walls to said plate and for sealing the inner compartment fromthe outer compartment at said end, a spider at the discharge end of saidreceptacle, said spider'having an outer ring attached to said outer walland a tubular hub spaced radially inwardly from said ring and attachedto said inner wall, said hub providing a passage for discharge ofmaterial from the inner compartment and said hub and ring providing apassage for discharge of material from the outer compartment, a flexibleand collapsible inner sleeve attached to said hub and forming acontinuation of the passage from the inner compartment, a flexible andcollapsible outer sleeve of larger diameter than the inner sleeveattached to said ring and forming with said inner sleeve a continuationof the passage from the outer compartment, and means for releasablyclamping said sleeves to prevent discharge of material from saidreceptacle comprising a pair of parallel rubber covered rods mounted onthe receptacle and disposed transversely of the receptacle axis, andmeans for pressing one of said rods toward the other to clamp saidsleeves between them.

8. The combination with a receptacle having inner and outer tubularwalls providing an inner compartment and an outer compartmentsurrounding the inner compartment, means forming passages opening tosaid compartments at one endof the receptacle comprising an inner sleeveand means connecting one end thereof to said inner wall to provide apassage opening to said inner compartment and an outer sleeve of largerdiameter than the inner sleeve and sourrounding the same and meansconnecting one end thereof to said outer wall to provide a passageexteriorly of said inner sleeve and opening to said 'outer compartment,said sleeves being flexible and collapsible and of sufficient length topermit them to be flattened and folded to dispose their flattened freeends across the axis of the receptacle and substantially perpendicularto said axis, and means for releasably clamping the free ends ofthe'sleeves so folded to close said passages comprising a pair ofclamping bars and means far releasably supporting said bars in axiallyspaced parallel relation and substantially normal to the axis of thereceptacle to receive the free ends of the sleeves between them and forpressing one of said bars toward the other to clamp the free endportions of the sleeves between them. a

9. A receptacle such as defined in claim 8 in which the outer sleeve isformed of elastic rubber having fabric reinforcement at its attached endand throughout the major portion of its length but terminating short ofits free end, in which the inner sleeve is composed of eiastic rubberand extends to the free end of said outer sleeve and in which theclamping means is applied to free end portions of said sleeves which arecomposed entirely of elastic rubber.

10. The combination as defined in claim 8 in which the clamping bars arein the form of rubber covered rods.

11. The combination as defined in claim 8 in which the clamping bars areflexibly suspended from the receptacle to fall to positions laterallyclear of said sleeves when released.

12. The combination as defined in claim 11 in which the clamping barsare attached to the free ends of fabric aprons'that are attached to thereceptacle on diametrically opposite sides of said sleeves.

13. The combination defined in claim 12 in which the fabric aprons areof a width to provide a cover for the folded sleeves when they areclamped by the clamping bar.

14. The combination defined in claim 8 in which the inner sleeve is ofgreater length than the outer sleeve and projects beyond the end of theouter sleeve when the sleeves are folded and clamped. a

15. A receptacle having a closure plate at one end and a dischargeoutlet at its opposite end, means for opening and closing said outletand venting means in said closure 1 plate comprising an opening in saidplate and an elastic its sealing portion that is of a diameter less thansaid opening and of a length greater than the thickness of said plate atsaid opening, and a head of greater diameter than said opening at theouter end of said stem for engagement with the plate to limit inwardmovement of said plug.

References Cited in the file of this patent UNITED STATES PATENTS2,612,924 Cunningham Oct. 7, 1952 3,018,880 Brughmann Jan. 30, 19623,028,898

Gooding Apr. 10, 1962

1. A RECEPTACLE COMPRISING AN OUTER FLEXIBLE TUBULAR WALL HAVING ENDPORTIONS THAT EXTEND RADIALLY INWARDLY AND THAT TERMINATE IN ANNULARBEADS TAHT DEFINE CENTRAL END OPENINGS, SAID WALL COMPRISING SUPERPOSEDPLIES OF TIRE FABRIC EXTENDING FROM BEAD TO BEAD AND COVERED EXTERIORLYAND INTERIORLY WITH RUBBER, ONE OF SAID END PORTIONS TAPERING TOWARD ITSBEAD, A PLATE CLOSING THE OPENING AT THE OTHER END OF SAID WALL, SAIDPLATE BEING PROVIDED WITH A PERIPHERAL BEAD SEAT, AN INNER FLEXIBLE ANDELASTIC TUBULAR RUBBER WALL EXTENDING AXIALLY OF THE RECEPTACLE ANDDIVIDING THE SAME INTO AN INNER COMPARTMENT AND AN OUTER COMPARTMENTSURROUNDING THE INNER COMPARTMENT, SAID INNER TUBULAR WALL HAVING ONEEND OVERLYING SAID BEAD SEAT AND A SMALLER END ADJACENT THE OPPOSITE ENDOF THE RECEPTACLE, MEANS FOR CLAMPING THE LARGER END OF SAID INNER WALLTO SAID PLATE AND THE ADJACENT BEAD TO SAID BEAD SEAT, A SPIDER ATTACHEDTO THE TAPERED END OF SAID OUTER WALL, SAID SPIDER HAVING AN OUTER BEADSEATING RING, A CENTRAL HUB SUPPORTED WITHIN SAID RING AND PROVIDING ACENTRAL PASSAGE THROUGH SAID HUB TO OR FROM THE INNER COMPARTMENT AND ANOUTER PASSAGE BETWEEN SAID HUB AND SAID RING TO OR FROM THE OUTERCOMPARTMENT, MEANS FOR CLAMPING THE SMALL END OF SAID INNER TUBULAR WALLTO SAID HUB, MEANS FOR CLAMPING THE BEAD AT THE TAPERED END OF SAIDOUTER WALL TO SAID BEAD SEATING RING, AND MEANS FOR OPENING AND CLOSINGSAID PASSAGE.